Automatic multiple drilling-machine.



No. 753,905. 4 PATENTED MAR.18, 190g F. J. NUTTING-.'.

AUTOMATIC MULTIPLE DRILLING MACHINE APPLICATION run-n JAN.13, 1902.

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No. 753,905. PATENTBD MAR. 8, 1904'.

. F. J. NUTTING. AUTOMATIC MULTIPLE DRILLING MACHINE;

- APPLIOQTION FILED J'AN.13,'1902. N0 MODEL. g sHnnTsqsHEn'r z.

m: mums PETERS m PHOTO-THO WASHINGTON. n. c.

- Ila-753,905. PATENTED MAR. a 1904.

F. J. NUTTING.

AUTOMATIC MULTIPLE DRILLING MACHINE.

Arrmpnron IILED'JAN.13,1902. no nonrln. 4 v e snnntrs-snnnm a.

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No. 753,905. PATENTED MAR. 23, 1904.

F. J. .NUTTING.

AUTOMATIC MULTIPLE DRILLING. MACHINE.

. APPLICATION FILED J'AN.13. I902.

H0 MODEL.

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vN0. 753,905. PATENTED MAR. 8,1904.

F. J. NUTTING.

AUTOMATIGMULTIPLE DRILLING MACHINE.

APPLICATION FILED JAN.13. 1902. no monsn. s snxms-snnnr 5.

F. J. 'NUTT ING.

VPATENTEVD MAR. s, 1904} AUTOMATIC MULTIPLE DRILLING MACHINE.

APPLICATION FILED JAH.13, 1902.

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' Km/ m? %/.ATTUH'NE\K the turret-head and the feed table or platenUNITED STATES Patented March 8, 1904. i

PATENT OFFICE.

FREDERICK 'J. NUTTINc, OF DAYTON, OHIO, ASSIGNOR, BY DIRECT AND MESNEASSIGNMENTS, To THE. NATIONAL AUTOM TIO TOOL 00., or

DAYTON, OHIO. f

AUTOMATIC MULTIPLE DRILLING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 7 53,905, dated March'8, 1904. Application filed January 13, 1902. Serial No. 89,568. (Nomodel.)

To all, whom it may concern;

Be it known that I, FREDERICK J. 'NUTTING, a citizen of the UnitedStates, residing at Dayton, in the county of Montgomery and State ofOhio, have invented certain new and useful Improvements in AutomaticMultiple Drill.

ing-Machines; and I do declare the following tobe a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompacity for drilling a multiplicity of holes ofvarying or uniform diameters and of varying or uniform distances apartand for transmitting to the several groups of drills the proper cuttingspeeds While in use. 7

A further object of my invention is to provide mechanisms forautomatically indexing simultaneously, the platen at uniform or varyingdistances or the turret-head independently of the feed table or platen,and for elevating the platen at varying speeds.

Preceding a detail description of my inven:

- tion reference is made to the accompanying drawings, of which Figure 1is a front elevation of my invention. Fig. 2 is a rear elevation. Fig. 3is a side elevation. Fig. iis a vertical sectional elevation through thecenter of the turret-head and the lower mechanism. Fig. 5 is a sectionalview through the platen on the line 1 1 of Fig. 1. Figs. 6 and '6 aredetached plan views of one of the plates by means of which the groups ofdrill-spindles are-supported on the sides of the turret-head. Thesefigures show means for driving the drill-spindles of. a group at uniformor equal speeds and at unequalor different speeds, also the means formounting the drill-spindles of a group at equal or imthe machine isdependent.

equal distances apart. Fig. '7 is a plan view 8 is an enlarged elevationof a portion of the segment-gear. Flg. 9 is an elevation of a portion ofthe mechanism for locking the the feed table or platen and themechanisms cooperating therew ithto wit, the mechanism by means ofwhichthe platen is indexed simultaneously with the indexing of theturret- .head and at uniform or varying distances. I

will next describe the mechanism for actuating the feed table or plateninto and out of operative relation with the drills on the turret-head. Iwill next describe the several cam movements upon which the operation ofI will next describe the speed mechanisms through which varying speedsare obtained, and other details of construction will follow.

Throughout the specification similar reference characters indicatecorresponding parts in the several views of the drawings.

A designates the several parts of an upright frame, in the upper portionof which a multi-' Sided turret-head B is mounted. In the presventinstance the turret-head is shown to have six sides; but thenumber ofsuch sides may be varied. The hub B of the turret-head is dles 6's,which radiate from the center'of the turret-head. (See Fig. 1.) On eachof the spindles b there is a clutch and a spring,

I) is a bevel-gear of a portion of the speed combination. I Fig.

by means of which the said spindles are periodically and automaticallythrown in and out of operation. Geared to the spindles b by trains ofbevel-gears 6 (which may be uniform or differential) is an additionalnumber of spindles 6 which are also .controlled by clutches Z1 andsprings, so that there are in the present instance a number of spindlesdriven from the center gear Z) which corresponds with the number of thesides of the turret-head. These several spindles b and b and theirrespective gears are supported in a suitable number of bearings 6,projecting from the face of the turret-head and encircling the centergear 6, as shown in Fig. 1. The ends of said spindles project into theouter members of the clutches, which have bearings in the sides of theturret-head, and said spindles are provided with pinions b of anydesired diameter, according to the work to be performed by the drills.The pinion 5 as shown in Fig. 6, is geared to a group of drillspindlesc, the individual spindles a being driven at uniform speeds throughidlers or transmission-gears c. In Fig. 6 the pinion 6 is shown gearedto a group of drill-spindles 0 by differential transmission-gears 0, sothat the individual drill-spindles are driven at unequal or differentialspeeds. If the holes to be drilled in any particular piece of work areof varying diameters and varying distances apart, the drill-spindles care set in plates 0" accordingly and are geared to the spindles drivenfrom the center gear 5 by idlers 0, according to their positions and therequired speed. Each of the clutches has a shiftinglever d, which isfulcrumed on a bracket d, projecting from the inner sides of theturrethead. A coil-spring d", inclosed within said clutches, normallymaintains such clutches separated until they are brought in an operativerelation by the action of a cam or projection d which is fixed to aportion of the frame A in a lower position. This automatic operation ofthe clutch-levers occurs in the rotation of the turret-head by means ofthe turret-headindexingmechanism, hereinafter described. (See Fig. 4.)The drill-spindles c are journaled in plates 0', which are secured toeach.

other by distance-studs c and are rigidly and detachably secured to thesides of the turrethead by bolts 0 in a proper position for the gears tobe driven from the pinions on the spindles Z) and 6 Suitable openings inthe plates 0 are provided, according to the number and positions of thedrill-spindles.

It will be understood that the supportingplates 0 for the drill-spindles0 are not fixed and permanent parts of the turret-head, but that foreach different job of work a separate set of these supporting-plates aresupplied. In other words, as seen in Fig. 1, the turrethead is suppliedwith two groups of dril1l-spindles each of which has its own set ofsupporting-plates c". The remaining four sides the head thereof.

of the turret-head are supplied with sets of supporting-plates c, whichhave no drill-spindles therein. In the event that six holes, forexample, were required to be drilled in a particular job of work it isobvious that neither of the groups of drill-spindles shown in Fig. 1could perform such work. It therefore would require an additional groupof drillspindles to be mounted upon the turret-head. If any one of thesets of supporting-plates 0 shown on the turret-head minusdrill-spindles had the required number of holes to support sixdrill-spindles and such holes were in the proper positions, such set ofplates might be utilized for that particular job of work; but if none ofthe said sets of plates had the required number of holes to support saidsix drill-spindles, or if the holes in said set of plates were not inproper positions, it is obvious that a new set of plates 0 suitable forthe new set of drill-spindles would have to be supplied to theturret-head. This would require the removal of one of the sets of platesnow shown in Fig. 1.

C is an indexing-plate, which is secured to the hub B of the turret-headby means of bolts C or otherwise. The hub C of this indexing-plate fitsloosely on the driving-spindle B. Projecting from the outer face of saidindexing-plate are a series of roll-studs G which correspond to thenumber of the sides of the turret-head. There are also a series oflocking-recesses C in the periphery of said indexing-plate, the numberof such recesses also corresponding to the number of the sides of theturret-head. The periphery of the indexing-plate on one side of each ofthe locking-recesses is somewhat lower than the periphery on the otherside of said locking-recesses. The lower points of said periphery areindicated by e. The object and purpose of this variation in theperiphery of the indexing-plate is to prevent any overthrow of theturret-head under the momentum imparted thereto by the indexing-lever.

D designates a turret-head-indexing lever. D is the head of said lever,which has a pivotal connection D with the lever and is adjustable tomake proper contact with the rollstuds C by meansof a screw D whichpenetrates the lower projection of said head andstops against theindexing-lever.

e is a coil-spring which controls the pivotal connection between theindexing-lever and The said head, it will be observed, has a curved sideD When the indexing-lever is returned to its normal position, as shownin Fig. 2, under the influence of spring D the said curved surface comesin contact with the adjacent roll-stud C and yields upon its pivot untilit passes said stud, after which the spring 0 causes it to assume itsnormal or straight position, as shown in Fig. 2. The lower portion ofthe turrethead-indexing lex er has a pivotal connection D with theframe, and the extreme lower end has a roll-stud D which rides upon theperiphery of a three-pointed cam Eand obtains the necessary throwtherefrom.

F is the turret-head shot-bolt, which looks said-head after eachoperation of indexing. The upper end of this bolt rides against theperiphery of the indexing-plate O, and as the higher points of suchperiphery (which points lie on one side ofeach of thelockingrecesses C)come in contact with the shotbolt F the plate is stopped and therewiththe I turret-head. The shot-bolt at such times enters the recess 0* inline therewith and locks the turret-head ineach indexed position. Thetwo parts of theshot-bolt F have an adjustable connection F, by means ofwhich the upper member of said bolt may have a proper entrance into andout of the locking-recesses C in the indexing-plate. As before stated,the purpose of this shot-bolt is to lock the turrethead in eachindexedposition, which it does by entering said recesses 0* uponthe'termination of each movement imparted to the turret -head throughthe indexing-lever. The coil-spring f presses upwardly on the lower endof the shot-bolt and causes said bolt to enter said recesses 0*.

Referring to Fig. 2, it will be observed that the shot-bolt roll-stud Fis in the lowest part of the camslot F", (the lowest portions of saidslot extending from w to 004,) during which time the shot-bolt is heldout of engagement with the indexing-plate. When said roll-stud moves outof 'such portion of said cam-slot and onto the higher portion from m to012 the shot-bolt is permitted to enter a recess 0* through the actionof the spring f, the surface from m to m serving as additional means formaintaining the bolt in a locked position for the desired period. Itwill be understood that each movement imparted to the turret-headthrough said indexing-lever D is sufficient to bring one of the sidesiofthe turret-head in the lower position, or in a position for a group ofdrills to operate on the material or stock on the feed table or platen,as hereinafter more fully described. The shot-bolt Fis actuated toWithdrawfrom a recess 0 during the rotation of wheel -F prior to eachoperation of the indexing-lever D. The said shotbolt'has a slot F, whichreceives a projection A on-the frame, said projection being a guidewhich directsa propermovement thereof.

The cams F and E may be integral or separate parts rigidly united. Theyare mounted on a shaft H, which 1 will hereinafter term the cam-shaft,which is driven from a worm shaft P, .to be again referred to G and Gdesignate two parts comprising the feed table or platen, which partshave a dovetail connection that permits of the upper part G, or theplaten proper, havinga suitable longitudinalmovement or movements, whichI will term the indexing movements, by

spring or varying distances with reference to the turret-head, asrequired by the character of the work to be performed. These indexingmovements are obtainable through the following mechanisms:

G designates a rack extending approximately the length of the platen Gr.Adapted to mesh with'this rackis a pinion g, which is mounted .on thepart G.

G is a segmental gear which at predetermined periods is actuated toengage with the pinion g to impart the indexing or longitudinal movementto the platen G. The entering tooth g of this segment-gear is of aflexible character in order that the gear may properly engage thepinion. (See Fig. 8.) The said flexible tooth is pivoted at g, and thepitch-line thereof is enabled to normally coincide with the pitch-lineof the permanent teeth of said segment-gear by means of awhich normallypresses said tooth' outwardly'to the lower limit of the slot therein,there being a pin 9 projecting from a side of the gear and passingthrough the slot g in said flexible tooth, which limits the movementthereof. In advance of this flexible tooth the gear has a camportionh,'which engages with the platen shot-bolt h by means of a pin h on saidshot-bolt to withdraw said shot-bolt from a locking engagement with theplaten in the initial movement of the segmentgear. (See Figs. 1 and 4:.)The segment-gear G is mounted on the cam-shaft H and has an arm G whichsupports a roll-stud g. The

hub of this gear, from which the arm Gr extends,has afriction-collar Gwhich surrounds to place it in position for the pinion g to gear,

with the segment-gear at the commencement of an indexlng operatlon.

The platen G is provided with a series of I locking-recesses 2',arranged therein at irregular or uniform distances and by means of whichsaid platen may be indexed atuniform or varying distances with relationto the tur-,

ret-head, depending upon the work to be performed. When such platenis'indexed or brought to the proper position, it is locked in suchposition by means of the shot-bolt hh.

This shot-bolt, which has been heretofore re-' ferred to, is mounted ina way on support is,

which projects from a side of the partG' of.

the platen, and is seated upon a coil-spring k,

which normally exerts an upward pressure thereon. 7a is an oblong slotin the support it, through which projects a stud which is fast on theside of said bolt. This stud it is connected to a hand operating-levera, which has its fulcrum at a on the lower platen G. By means of thishand-lever a the shot-bolt k may be lowered from any of thelocking-recesses prior to running the platen back by the handwheel J.There is also on pivot a a bellcrank lever a", one arm of whichterminates in a fork which straddles the stud k and the other arm ofwhich hasa pivotal connection at a to a link a. The other end of saidlink a is pivoted to an upright bar or link lever a at a". The bar a hasapivotal connection at a to the platen G. The lower end of the bar orlink a carries a roll-stud a", which moves against a vertical track orsurface a when the platen is elevated. (See Figs. 1 and 9.) The track ais a surface of a bracket A, which is bolted on the side of the frame.The function of this system of levers is to lock the platen shot-bolt hin the index-recesses i, which is accomplished by the link a being movedoutwardly by the contact between the roll-stud a? and the track a ineach elevation of the platen. This action locks the bell-crank lever aon the pin k and maintains such locking engagement. When the platen islowered, this engagement is relieved and the shot-bolt It is free to betripped by the cam It on the segment-gear in the initial mo vements ofsuch gear. The required movement is imparted to the segment-gear inindexing the platen by means of a plurality of cams j, which areadjustably mounted in ways j on the face of the wheel L. The number ofthese cams may correspond to the number of sides of the turrethead, andthe platen may be indexed at uniform or varying distances, according tothe positions and the number of such cams used. Each of said cams issecured in position by means of abolt j, which penetrates said cams andthe oblong opening 1' in the wheel L. The adjustments of said cams fromand toward the axis of the wheel L is obtained by adjusting-screws j,which screw into said cams. These cams make proper contact with therollstud g, and thereby actuate the segment-gear to an extentcorresponding to the positions and number of said cams. The wheel L isplaced on the shaft H and contains the cams that actuate theplaten-indexing mechanism.

The platen G G is mounted on a verticallymovable frame K,which is guidedin its movement in V-shaped ways in the frame A of the machine. Thismovable frame has a roll-stud K, which rides upon the periphery of asuitable cam K on the cam-shaft H. The shaft H lies parallel with thecam-shaft H and is driven from said shaft H through gears M M M, theshaft H making one rotation to two rotations of the cam-shaft.

1 will next describe the speed combination through which the shafts Hand H are driven at suitable speeds.

N designates the primary driving-shaft, through which power istransmitted to the machine. This shaft is driven from pulley N and has aclutch N, which will be again referred to. N N N designate a series ofdifferential spur-gears, which are rigidly secured to said shaft. Thefirst-named gear to wit, N meshes with a gear 0. The nextnamed geartowit, Nmeshes with a gear 0, and the last-named gear, N meshes with agear 0. The gears O O O are mounted on an intermediate driving-shaft P,which drives the shafts H and H. The gears O and 0 have clutches O andO. All the gears run loose on shaft P and the clutches are splined onsaid shaft. Gear 0 has an adjacent ratchet-Wheel 0 which is rigidlymounted on shaft P.

O is a ratchet-pawl which is pivoted to the wheel 0 and engages with theratchet-wheel O at predetermined periods to drive the shaft P at theminimum speed. The shaft P carries a worm P, which gears with awormwheel P on the cam-shaft H. When the clutch O is in gear, as shownin Fig. 2, the shaft P is driven at its maximum speed. When the clutch Ois out of gear and the clutch O is in gear, the shaft P is driven at theintermediate speed through the gears N and 0. When the clutches O and O-are both out of gear, the wheels 0 and O are run- Q is a timing-wheelkeyed to the shaft H.

The periphery of this wheel is provided with cam-surfaces a n n. Thefirst named of these forms the outermost periphery of the wheel, thesecond-to wit, n'forms the intermediate periphery of said wheel, and thelast namedto wit, n-forms the lowest periphery of said wheel.

Q, is a clutch-lever connected to the movable members of the clutches OO in the usual manner. The lower end of this lever is rigid on arock-shaft Q. Also rigidly secured to said rock-shaft isa lever Q whichcarries a roll-stud Q, that rides upon the cams a, n, or n on wheel Q atpredetermined periods, according to the work. The cams n n n areremovable. When the greatest speed is transmitted to the worm-shaft P,the roll-stud Q rides upon the highest periphery n, which throws intogear through the shifting-lever Q the clutch 0 as shown in Fig. 2. Whensuch roll-stud Q rides upon the cam-surface a", the clutch O is thrownin gear and clutch out of gear, and the worm-shaft P is then I rotatedat the intermediatespeed. When the roll-stud Q rides upon thecam-surface a, both clutches O and O are out of gear, and the worm-shaftis driven at the minimum speed through gears N and O and the ratchets Oand 0.

q is a trip-piece secured to a face of a timing-wheel Q. At a completerotation of said timing-wheel power is cut off automatically from theshaft N through this trip-piece and the following mechanisms: 7

q is a trip-piece on a rock-shaft q".

R, R, and R is a system of levers which are connected to a clutch-leverR which controls the admission of power to the machine. When the clutchN is in gear, the horizontal lever B is locked in the latch R. When therotation of the timing-wheel Q, brings the trip-cam q in contact withthe trip-piece g, the'rock-shaft q is actuated. The lever R is therebyelevated and freed from engagement with the latch R, and the action ofthe spring inclosed within clutch N separates said clutch, and thus cutsoff the power from the power-shaft N, the clutch-lever R moving on itsfulcrum R which fulcrum is on a bracket A There is also means formanually cutting off the power when such becomes necessary for anyreason. This means is shown in Fig. 1 and consists of a hand-lever R,which is rigidly secured to the rock-shaft g. In this operation of thelever the shaft 9" is actuated to release the lever B from the latch R.The machine is started by a hand-lever S, which is fast on a rock-shaftS,

the said shaft also being connected to the clutch-lever B throughlink-levers S, S and S, the shaft of the last-named lever beingconnected to the clutch-lever R by a rockshaft R, which is the fulcrumof said clutchlever. (See Fig. 3.)

The movements imparted to the turret-head indexinglever and theturret-head shot-bolt are not varied. In other words, the movementsnecessary to index the turret-head and lock it are always the same, saidmovements being such in each case as are necessary topresent the sidesof the turret-head in the lower plane, or that position which isparallel with the feed table or platen, and to lock said turret-head insuch position; but, as hereinbefore stated, the indexing movementsimparted to the feed table or platen G, being either of uniform orvarying distances, require varying movements or uniform movements to beimparted to the segment-gear G It will therefore be observed that thecams j on the wheel L may be adjusted and limited in number to obtainthrough the segment-gear G such movements of said platen. The cams jbeing thus placed in their proper positions relative to the roll-stud gpower is introduced to the machine through the operatingdever S, the

distinct groupings of drills I am enabled to run those drills only whichare required for the work and to successively bring into operation othergroups of drills at such times as they are needed.

The platen may be supplied with a-number of different jobs or pieces ofmaterial which may be successively operated upon by separate groups ofdrills, drilling holes of uniform or varying diameters and at uniform orirregulardistances apart. a

'I wish to claim, broadly, among other important features of myinvention, the idea of means whereby drill-spindles may be assem: bledin groups and one or more of the different drill spindles comprisingeach group driven at uniform speed or speeds orone or more of suchdrills driven at different speed or speeds. In other words, eachspecific drillspindle of any group may be driven at its own requiredspeed regardless of the speed or speeds of the remaining drills of suchgroup or groups. 7

- While I have shown and described a turrethead having a seriesofdistinct sides or faces, I do not wish to limit myself to such identicalform of turret-head, for the reason that it may be possible to utilize around turret-head for the purposes of my inventionthat is to say, bymeans of the supporting-plates a? it may be possible to mount aplurality of groups of drill-spindles around the circumference of suchturret-head. .It may be stated, however, that the turret-head hereinshown and described is of the much preferred construction;

Having described my invention, I claim 1. In a multipledrilling-machine, a turrethead having aseries of straight sides, aseriesof spindles mounted in said turret-head, means .for driving saidspindles, groups of drill-spindles, means for mounting said groups ofdrillspindles on the sides of the turrethead,means for driving eachgroup of drill-spindles, an indexing-plate on the turret-head, anindexing-lever cooperating with said turret-head to automatically indexthe turret-head to present each group of drill-spindles in an operativeposition.

2. In a multiple drilling-machine, a' turrethead having a series ofstraight sides, a series offradial spindles therein, a center spindle todrive said radial spindles, a plurality of groups of drill-spindlesdriven from said radial spindles, means for supporting each group ofdrillspindles on the sides of the turrethead,means for throwing eachgroup of drill-spindles in and out of gear with their respectiveactuating-spindle, an indexing-plate on the turrethead, anindexing-lever adapted to engage with said. plate to rotate theturret-head, and means for automatically actuating said indexing-lever.

3. In a multiple drilling-machine, a turrethead havinga series ofstraight sides, a series of radial spindles mounted in said turret-head,groups of drill-spindles driven from said radial spindles, means formounting said groups of drill-spindles on the sides of the turrethead,means for driving the drill-spindles of each group, means forautomatically throwing each group of drill-spindles in and out of gearwith their driving-spindles, an indexingplate on said turret-head, anindexing-lever adapted to actuate said turret-head to impartintermittent rotary movement to said turrethead whereby each group ofdrill-spindles is brought into an operative position,and means foractuating said indexing-lever.

4:. In a multiple drilling-machine, a turrethead having a series ofsides or faces, a series of spindles mounted therein, a center spindlefrom which said spindles are driven, a plurality of groups 'ofdrill-spindles geared to said driving-spindles, plates by means of whichthe groups of drill-spindles are mounted on the sides or faces of theturret-head, means for automatically throwing each group ofdrill-spindles in and out of gear with their respective driving-spindle,means for automatically indexing the turret-head, and means for lockingsaid turret-head in each indexed position.

5. In a multiple drilling-machine, a turrethead having a series of sidesor faces, a series of radial spindles therein, a central spindle fordriving said radial spindles, groups of drill-spindles driven from saidradial spindles, means for supporting each group of drillspindles on thesides of the turret-head, means for automatically throwing each group ofdrill-spindles in and out of gear with their respectiveactuating-spindle, an indexing-plate on said turret-head, anindexing-lever to actuate the turret-head by engaging with said plate topresent each group of drill-spindles in an operative position, a bolt tolock said turret-head in each indexed position, and means for actuatingthe indexing-lever and said bolt at the proper times.

6. In a multiple drilling-machine, a multisided turret adapted toreceive groups of drillspindles, groups of drill-spindles mountedthereon, means for driving said groups of drill-spindles, means forautomatically throwing each group of drill-spindles into and out ofoperative relation with their driving-spindle's, a feed table or platen,and means for indexing the turret and platen simultaneously.

7. In a multiple drilling-machine, a multisided turret-head, groups ofdrill-spindles mounted on the sides thereof, means for driving saiddrill-spindles, means for throwing each group of such drill-spindlesinto and out of operative position, a feed table or platen, and meansfor simultaneously indexing said turret-head and platen, the platen atuniform distances.

8. In a multiple drilling-machine, a multisided turrethead, groups ofdrill spindles mounted thereon, means fordriving said drillspindles,means for throwing each group of such drill-spindles into and out of anoperative position, a feed table or platen, and means for simultaneouslyindexing the turret-head and the platen, the platen at uniform orvarying distances.

9. In an automatic multiple drilling-machine, a turret-head having aseries of sides or faces, groups of drill-spindles arranged on saidsides or faces, means for driving said drill-spindles, means forthrowing each group of drill-spindles into and out of operativeposition, automatic indexing mechanism for the turret-head, a feed tableor platen, automatic indexing mechanism for said feed table or platen,means for timing or, operating said mechanism to shift said feed tableor platen into operative relation with the turret-head upon eachindexing operation of the latter, and means for locking the turret-headand the feed table or platen in each indexed position, substantially asspecified.

10. In a multiple drilling-machine, a multisided turret-head, aplurality of radial spindles mounted therein and driven from a centerpinion, groups of drill-spindles mounted on said turret-head, means forthrowing in operation each group of drill-spindles when required, anindexing-plate on said turret-head, an indexing-lever to actuate saidplate and whereby the turret-head is automatically indexed, means foractuating said indexing-lever, a feed table or platen, means throughwhich said feed table or platen is actuated to index the same at uniformor varying distances, and means for elevating said feed table or platenafter each operation of indexing the turret-head and said platen.

11. In a multiple drilling-machine, a multisided turret-head, aplurality of groups of drill spindles mounted thereon, means for drivingeach group of drill-spindles when required,the several drill-spindles ofeach group at uniform or varying speeds, a feed table or platen, meansfor indexing the turret-head to bring each group of drill-spindles inoperative relation with said platen, means for indexing the platensimultaneously with the indexing of the turret-head, means for lockingthe turret-head and said platen after each opsided turret-head, groupsof drill-spindles arranged on the sides thereof,'means for driving eachgroup of drill-spindles at predetermined times, means for automaticallyindexing said turret-head, a feed table or platen, means forautomatically indexing said platen simultaneously with the indexing ofthe turret-head and at uniform or varying distances, and means forlocking said turret-head and platen in each indexed position.

13. In a multiple drilling-machine, the combination of a multisidedturret-head, groups ofdrill-spindles mounted on the sides thereof, meansfor driving the spindles of each group at predetermined times, means forindexing the turret-head, a feed table or platen, means for indexingsaid platen, a plurality of cams through which the indexing mechanismsof the turret-head and the indexing mechanism of the platen areactuated, means for elevating the platen after each operation ofindexing, a timing-wheel, and mechanism interposed between saidtiming-wheel and the main powershaft through which the power is cut offafter each complete operation of the machine.

14. In a multiple drilling-machine, the combination of a multisidedturret-head, a plural ity of radial spindles mounted therein and drivenfrom a center pinion, groups of drillspindles mounted onthe sides of theturrethead, clutches and springscontrolling the connections between thedrill-spindles and their driving-spindles, an indexing-plate on theturret-head, an indexing-lever, a pivotal head on such lever whichengages said indexing-plate to rotate the turret-head, a cam foractuating said indexing-lever, a shot-bolt to lock theturret-head ineach indexed position, a double cam to actuate said shot-bolt after eachoperation of the indexing-lever, and means for imparting varying speedsto the shaft upon which said cams are mounted.

15. In a multiple drilling-machine, the combination of a multisidedturret-head, a plurality of radial spindles therein driven from a centerpinion, groups of drill-spindles, clutches and springs controlling theconnections of each group of drill-spindles with its respectivedriving-spindle, an indexing-plate on the turrethead, an indexing-leverhaving a pivotal head which actuates the indexing-plate in each indexedposition, a shot-bolt to lock the indexing-plate, cams to actuate theindexing-lever and the shot-bolt at the proper times and to the properextent, a worm-gear, a timing-wheel having removable cam-piecesand-means interposed between said cam-pieces and said wormgear, wherebythe speed imparted to the worm shaft may be regulated to any of thespeeds required and at any fraction of a revolution desired.

16. In a multiple drilling-machine, the combination of a multisidedturret-head, groups of drill-spindles arranged on the sides thereof,means for driving the drills of each group of drill-spindles as desired,indexing mechanism for said turret-head, cams for operating saidindexing mechanism, a worm-shaft from which the cam-shaft is driven, atiming-wheel with suitable cam or cams thereon, means interposed betweensaid cams and. said worm-shaft through which the speed of the cam-shaftis regulated, and stop-levers actuated upon the completion of a movementof-the timing-wheel and through which the machine'is automaticallystopped after each operation and means for actuating said stop-levers.

17.- In a multiple drilling-machine, the com: bination ofa multisidedturret-head, groups of drill-spindles mounted thereon, mechanism forindexing the turret-head, means for actuating each group ofdrill-spindles after each operation of indexing the turret-head, a feedtable or platen, mechanism for indexing said feed table or platen, camsthrough which the indexing mechanisms of the turret-head and platen areactuated, a worm-shaft through which the cam-shaft is driven, a speedcombination through which varying speeds may be transmitted to thecam-shaft through said worm-shaft, a timing-wheel, mechanismsinterposed-between the speed combination and said timing wheel andthrough which the speeds transmitted to the worm-shaft may be varied asdesired, mechanism interposed be tween the main shaft and saidtiming-wheel through. which the power is cut ofi' from the machine ateach complete operation thereof.

. 18. In a multiple drilling-machine, the combination of a multisidedturret-head, groups of drill-spindles mounted on the sides thereof,mechanism for indexing the turret-head, means for actuating eachgroup ofdrill-spindles after each operation of indexing the turret-head, a feedtable or platen, mechanism for indexing said feed table or platen, camsthrough whichtheindexingmechanisms of theturret-headand the platen areactuated, a worm-shaft through which the cam-shaft is driven, a speedcombination through which varying speeds may be transmitted to thecam-shaft, a timing-wheel, mechanism interposed between the speedcombination and said timing-wheel through which the speeds transmittedto the worm-shaft may be varied as desired, mechanism interposed betweenthe main power-shaft and said timingwheel through which power is cut offfrom the machine at each complete operation thereof,

and means for manually cutting off the power from the machine.

19, In a multiple drilling-machine, a feed table or platen, means forindexing said platen, means for loclging such platen after eachoperation of indexing the same, and automatic means for elevating saidfeed-table.

20. In a multiple drilling-machine, a feed table or platen, mechanismfor automatically indexing said feed table or platen at uniform orvarying distances, means for locking said feed table or platen in eachindexed position, and automatic means for elevating said feedtable aftereach indexing operation.

21. In a multiple drilling-machine, a feed table or platen, gearingadapted to impart indexing movements to said platen, means adapted tolock said platen in each indexed position, and means for elevating saidplaten after each indexing operation.

22. In a multiple drilling-machine, a feed table or platen, gearingadapted to impart indexing movements to said platen, a series ofadjustable cams through which uniform or varying movements may beimparted to said gearing, a shot-bolt for locking said platen in eachindexed position, and means for elevating said platen after eachoperation of indexing.

23. In a multiple drilling-machine, aplaten,-

gearing for imparting indexing movements to said platen, a series ofadjustable cams through

